Save these Plants

[Norkali]

So my last thread (Possible PM systemic) wasn't getting me anywhere; mostly because we've established that I do not have PM. What I do have is some kind of blight though. Necrosis begins on sides/tips of leaves, surrounded by a yellowish halo, then the necrosis spreads. This has been happening all over the plant, for the most part starting towards the bottom and working it's way up the plants. I have sprayed Serenade via foliar, cut off the worst looking leaves, and last night gave an application of Subculture to the root zone and as a foliar. This morning, I went to check and the blight has continued to spread at an alarming rate, leaves that only had a spot yesterday are ready to be plucked off today.

I am freaking out. This is a closet of genetics that I have ran around acquiring. I will be heading out to the hydro shop later and want to know what I should go for next, a foliar with Micronutrients or SM-90?

 

[Norkali]

Notice the fourth picture (below), it really shows the rate of infection spread, that leaf was green and healthy yesterday, last night.

For what it's worth, I had been feeding the ladies light feedings of Fox Farms Grow Big and Liquid Karma, then the problems started. I ran some searches and thought maybe it was a P or K deficiency so I fed with FF Big Bloom and LK (again, not heavy) but that didn't noticeably help either. (I also always check my pH, and the pH pen, making sure I am riding between 6.4-6.7) I made a huge mistake (as everybody knows) in thinking that it was still PM and tried the Zone/Penetrator dunks to get rid if the problem, but that just helped to spread the problem to every plant instead of three of them (Burkle, then Grape Ape and Blue Moonshine I think.) It was after that, once the blight started to really spread that I started trying to hit it with foliars.

Soil
How long has this problem been going on?
Two weeks.
What STRAIN are you growing?
Multiple. Various strains are affected.
What was the establishing technique? (Were the seed or clone?)
Clones.
What is the age of your plants?
I have had them for about a month.
How tall are the plants?
Most are 6-8 inches, Chemdawg and Headband ~1.5 feet.
What PHASE are the plants in? (seedling, vegetative or flower) are the plants in?
Veg.
What Technique are you using?
Mothers, cutting. Cuts were taken, and that's when the problem initially spread from the first plant. (Burkle)
What color are your roots? White? Brown? Are your roots slimy?
White last time I checked.
What Nutrient's are you using?
Fox Farms Grow Big, Liquid Karma, and FF Big Bloom (once.)
How often are you feeding?
Nearly everytime, just Subculture+distilled yesterday.
What is the TDS/EC/PPM you are using?
Don't monitor.
Are you sure your calibration is correct on your equiptment?
Yes.
When was your last watering?
Yesterday.
What size bulb are you using?
600W
What is the distance to the canopy?
4-5 feet.
What is your RH Factor(Relative Humidity)?
30-40%
What is the canopy temperature?
73-76f
What is the Day/Night Temp? (Include flucutaion range)
73-76f day, ~60-65f night
What is the current Air Flow? (cfm etc.)
6'' Can-Fan 24/7 cooling light and passive ventilation, oscillating fan on canopy.
Is the fan blowing directly at plants?
Set to oscillate onto plants lightly once every 6-7 seconds or so, otherwise bouncing off of walls, etc.
What water are you using? Reverse Osmosis (RO)?
Good tap, distilled for foliar.
Has plant been recently pruned, cloned off of or pinched
Yes, cuts were taken a week and a half ago.
Have any pest chemicals been used?
Fox Farms Don't Bug Me when I saw some of the borg on my Blue Dream, haven't seen them since.
Are plant's infected with pest's
Not to my knowledge. 95% sure.

 

[Norkali]

Okay. Things are starting to look better. *knock on wood*

I applied a foliar spray again this evening consisting of Thrive Alive B-1(green) and a tiny bit of SMC leaf wash, (basically SM-90, overpriced in a smaller bottle.) After the Serenade, and the Subculture yesterday - it looks like the plants are starting to fight back; there is RAPID new green healthy growth on each plant, and much of the discoloration/necrosis spots have turned a clean tan color, "bright" compared to what it was before - almost looks like the blight was "burned" out of the leaves. The real problem is the spreading of the problem though, which I am really watching - and it has apparently (I hope!) stopped, or at least really slowed down. I plan on giving a foliar of CalMag tomorrow as well, just as a further help for the cell walls. Will post some pictures tomorrow morning, when I can really see how things have progressed.

 

[dkmonk]

WTF did you do to the site you broke the sides off lol j/k

It looks like a virus or infection of somesort, I would suggest watering w/ a little hydrogen peroxide diluted into it, just in case it is an infection.

 

[IE2KS_KUSH]

Wow bud, I dunno. It sounds good if your new growth is normal, from the bottom up, hmmm.
Sorry I am no help, truth is you have probably forgotten more than I know about growing, so I am no help. Just wanted to say damn, sorry man. I know I would be shitting bricks too, but I bet you get a handle on it. Hopefully someone will chime in here, that's fucking A scary that it spread the way it did, I can handle losing a plant here or there, but fuck! That shit is attacking your LIBRARY there!
Good luck.

 

[moonymonkey]

at rate are u feeding an how much,an how often,how do u water...an wat type of medium are u in? im really leaning towards saying ,that the problem,is not a virius...really since it started after u fertilized..

 

[xxxskunkxxx]

You should purchase a PH meter and EC/ppm meter, you can get them for 20-30 each, well worth it.

And start monitoring your ph and ec, I believe your problem could be ph fluctuations or nutrient issues.

Buy your meters and find out!

 

[Norkali]

I have a pH meter, ph is fine going in, haven't checked the out recently.

Things are looking better, looks like it was a combo of lack of ventilation from where I had them before, and a Cal/Mag deficiency. In my theory, I think that a fungus/blight started on a few leaves and it was easily spread like fire with the deficiencies being present. ???

Anybody care to give a second opinion? I'm planning on hitting the ladies with a foliar application of CalMag this evening, in hopes that that is what these ladies need now.

 

[Norkali]

Nobody knows?

 

[Core]

you better check PH of the runoff and you're using a bit to much nutes it seems....
they yellowing on new growth is a classic ph problem or lockout.....ime....

 

[cocktail frank]

maybe the foliar you gave them for the pm is killing em.

 

[Weedhound]

Dude, where are you at right now? I read the top of the thread but can't follow all the different advice; which you took and which you didnt.

You still having the issue?

 

[Norkali]

you better check PH of the runoff and you're using a bit to much nutes it seems....
they yellowing on new growth is a classic ph problem or lockout.....ime....

Forgot to check the runoff last night. I agree, I think I may have given them a little too much too quick, some tips are a little crisp. I applied Fox Farms Tiger Bloom via foliar spray, the yellowing on that plant (Strawberry Cough) seemed to have stopped, seeing some healthy, but not 100% normal, green growth on it now.

maybe the foliar you gave them for the pm is killing em.

For sure, kind of. The Zone/Penetrator dunk spread the problem from 2-3 plants to all of them, so yeah my PM solution created these problems -inadvertently.

Dude, where are you at right now? I read the top of the thread but can't follow all the different advice; which you took and which you didnt.

You still having the issue?

Hound! There you are, I was beginning to think I had said something wrong somewhere or something...lol. Right now, I am seeing new healthy green growth, some parts/plants are still recovering, I might be having some overfeeding issues now, as stated above. It's either that or a lockout, like Core said. The blight problem has seemed to stop spreading, thank god.

• I have sprayed serenade on them about three times so far - once five days ago, again three days ago, and then last night. (hope this makes sense)
• Four days ago, I sprayed a foliar application of Subculture, along with a watering of distilled+Subculture; (followed different ratios, foliar vs. watering)
• Three nights ago (before the Serenade) I applied a foliar spray of Thrive Alive B-1 with some SMC leaf wash (SM-90) mixed in.
• And then two nights ago, I applied a foliar of Tiger Bloom, and then again last night.

A lot of foliar assault, lmao. As far as watering/feeding, they haven't been needing much lately, for obvious reasons, last night I watered with 1.75 tsp/gln. Tiger Bloom, and a tsp. of Cal-Mag pH'd to 6.5 in distilled water. This was the first I have given them anything by soil since the distilled+Subculture four days ago. Again, I hope I made this relatively easy to follow, sorry if it's confusing.

 

[medmaker420]

Forgot to check the runoff last night. I agree, I think I may have given them a little too much too quick, some tips are a little crisp. I applied Fox Farms Tiger Bloom via foliar spray, the yellowing on that plant (Strawberry Cough) seemed to have stopped, seeing some healthy, but not 100% normal, green growth on it now.



For sure, kind of. The Zone/Penetrator dunk spread the problem from 2-3 plants to all of them, so yeah my PM solution created these problems -inadvertently.



Hound! There you are, I was beginning to think I had said something wrong somewhere or something...lol. Right now, I am seeing new healthy green growth, some parts/plants are still recovering, I might be having some overfeeding issues now, as stated above. It's either that or a lockout, like Core said. The blight problem has seemed to stop spreading, thank god.

• I have sprayed serenade on them about three times so far - once five days ago, again three days ago, and then last night. (hope this makes sense)
• Four days ago, I sprayed a foliar application of Subculture, along with a watering of distilled+Subculture; (followed different ratios, foliar vs. watering)
• Three nights ago (before the Serenade) I applied a foliar spray of Thrive Alive B-1 with some SMC leaf wash (SM-90) mixed in.
• And then two nights ago, I applied a foliar of Tiger Bloom, and then again last night.

A lot of foliar assault, lmao. As far as watering/feeding, they haven't been needing much lately, for obvious reasons, last night I watered with 1.75 tsp/gln. Tiger Bloom, and a tsp. of Cal-Mag pH'd to 6.5 in distilled water. This was the first I have given them anything by soil since the distilled+Subculture four days ago. Again, I hope I made this relatively easy to follow, sorry if it's confusing.

I think you are doing way tooooo much to these plants. From the above it seems you feed or water them in one form or another damn near every day.

They could be fried from the light + having water all over the leaves, they could be burnt from the many nutes given, they could be locked out from the same reason but you might keep trying to feed them which odds are will create even more problems later.

Once you did the foliar spray things started changing correct, have you let them sit and see if the roots can get anything from them? My question is more of a, if you stop the foliar spraying will the problem come back. If they are eating from the leaves then odds are they are not doing it from the roots.

Have you flushed?

how often are you watering without nutes?

 

[Norkali]

New growth looks healthy on most of the plants, except the Strawberry Cough and a few other spots on a couple others.

 

[Skipload]

In the first photos u posted you will notice small shiny spots on the leaf surfaces. These are from small insects, most likely thrips. They help in the spread of that weird virus u see in some of the leafs. If you cut off infected leaves it stops the spread from attacking the entire plant via the stem. Thats important to know if you plan on cloning them.
I read somewhere problems are spreading? If you are dunking all your plants into the same bucket you will spread the infection through the lesions in the leafs. Ive noticed it spreads easy by contaminated sisors. cloning gel. broken roots in a nft or dwc system. and plants to close to other plants allowing thrips to easily graze the whole crop.

 

[stihgnobevoli]

the first pictures you posted looked like simple nute burn. i dont know what you've done since then, i skimmed and saw you were still feeding em and whatnot. i hope you get it solved.

 

[Weedhound]

Looks like you have some excellent folks here who definitely know their stuff. My only offering would be ease up on the Serenade....I wouldn't use it more often than once every 5 days.....I over did some plants once with it and they suffered because of it. I'd probably quit your foliar sprays altogether for awhile. I really think they affect the leaves adversely if done too much; like getting your hands wet too often....eventually it dries them out.

Are you running anything for root health?

And thanks NorKali, for kind words. I feel lost here among so many VERY learned minds so am sometimes uncomfortable giving out info here as hydro is really the only thing I know.

 

[Norkali]

Thank you all so much. I stopped the foliars and let them take what they needed from the soil for the past two days. This morning, I misted all of them with distilled water and they look great tonight. The blight has slowed to a crawl; I plan on using a few more application of Serenade (over time) to finish it off. I found a very helpful (although depressing) section on cannabis blight in Jorge Cervantes' book Indoor Marijuana Horticulture that deals with Cannabis blight specifically; the prognosis isn't very good. Link

I intend on saving these plants though, and thanks to you guys I might be able to do it. A few questions though. The infected leaves, should I try to salvage them, I.e. cut them back behind the blight, leave them and just apply Serenade, or should I just cut them off? Last time I removed leaves I had dunked (Zone/Penetrator) right after the cutting, so it (the blight) just spread through the dunks more; but no dunking this time, so I'm thinking this would help, yeah or no? Second, some plants are trying to flower, I'm thinking this might be due to the increased P&K levels, the small pots, and all of the recent stress. I have them on 24/0 right now to try to get them back to veg, is there anything else I can do to prevent premature flowering? Once, again - THANKS. Some pictures...

 

[HeadyPete]

They seem to have survived and outgrown your abuse....